SDLC: System Development Life Cycle In the Preliminary course, you were introduced to the system development cycle (SDC). It is a series of stages used in the development of a new information system. The traditional system development cycle has five broad stages:
Understanding the problem—requirements of a system to solve the problem
Making decisions—feasibility of a new system to solve the problem
Designing solutions—creating the new system
Implementing—using the system to solve the problem
Testing, evaluating and maintaining—ongoing operation of the system.
Design tools Assist in the development of a new system. They describe the information processes and rules within the system. Design tools include context diagrams, data flow diagrams, system flowcharts, decision trees, decision tables and data dictionaries. Tools used in designing, including: - Context diagrams – Level 0 DFD: A graphical method of representing an information system using only a single process together with inputs and outputs (external entities). - Data flow diagrams (DFD) – Level 1 DFD: A graphical method of representing an information system using a number of processes together with inputs, outputs and storage. - Decision trees: A diagrammatic way of representing all possible combinations of decisions and their resulting actions. It represents the decisions made within a system as the branches of a tree.
– Decision tables: It represents all possible conditions and actions. It indicates the alternatives for different conditions and actions based on the rules.
- Data dictionaries:A series of frames, each representing a different action or screen image. It shows the navigation between frames.
1. What is SDLC?
Terminology for ACU high yr12 Class
SDLC: System Development Life Cycle In the Preliminary course, you were introduced to the system development cycle (SDC).
It is a series of stages used in the development of a new information system.
The traditional system development cycle has five broad stages:
- Understanding the problem—requirements of a system to solve the problem
- Making decisions—feasibility of a new system to solve the problem
- Designing solutions—creating the new system
- Implementing—using the system to solve the problem
- Testing, evaluating and maintaining—ongoing operation of the system.
Design toolsAssist in the development of a new system. They describe the information processes and rules within the system. Design tools include context diagrams, data flow diagrams, system flowcharts, decision trees, decision tables and data dictionaries.
Tools used in designing, including:
- Context diagrams – Level 0 DFD: A graphical method of representing an information system using only a single process together with inputs and outputs (external entities).
- Data flow diagrams (DFD) – Level 1 DFD: A graphical method of representing an information system using a number of processes together with inputs, outputs and storage.
- Decision trees: A diagrammatic way of representing all possible combinations of decisions and their resulting actions. It represents the decisions made within a system as the branches of a tree.
– Decision tables: It represents all possible conditions and actions. It indicates the alternatives for different conditions and actions based on the rules.
- Data dictionaries: A series of frames, each representing a different action or screen image. It shows the navigation between frames.